I was thinking maybe something lineless (the lines are the same colour as the pet) or with unusually coloured lines? Such as a dark pet with paler lines, like this:
![Image](//www.chickensmoothie.com/pet/50486932&trans=1.jpg)
Here’s one where the lineart was coloured in, so it appears to be lineless!
![Image](//static.chickensmoothie.com/archive/image.php?k=335346F6380E1A51B9957D618FBA6E36&bg=cccccc)
I think that it would be really interesting since most pets on CS have black/dark lineart! There are a few pets on CS with pale lineart but it would be nice to see more <3